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Integer Sequences

Name: Anonymous 2011-05-29 1:54

What in common between following sequences:

6, 18, 36, 60, 90, 126, 168, 216, ...

and

14, 64, 174, 368, 670, 1104, 1694, 2464, ...

???

Find formula, that generates them.

Name: Anonymous 2011-05-29 2:11

map ?^(1/3) [1..2^16] | subst ?,frac==0.0 'i | ltl | {[@Xs 'i @Ys]->[Xs,len @Ys,r]}

6    18   36   60   90   126  168  216  270  330  396  468  546
630  720  816  918  1026 1140 1260 1386 1518 1656 1800 1950 2106
2268 2436 2610 2790 2976 3168 3366 3570 3780 3996 4218 4446 468


map {N -> (digits N | sum)^3 - (digits N | map ?^3 | sum)} [1..300] | drop 10

6    18   36   60   90   126  168  216  270  0    18   48   90
144  210  288  378  480  594  0    36   90   162  252  360  486
630  792  972  0    60   144  252  384  540  720  924  1152 1404

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