A144292 (0=0, 1=1, 2=2, 3=3, 4=2^2, 5=5, 6=2*3, 7=7, 8=2^3, 9=3^2, 10=2*5, 11=11, 12=2^2*3, ..) becomes (0*(0+1), 1*(2+2), 3*(3+4), 2*(2+5), 5*(6+2), 3*(7+7), 8*(2+3), 9*(3+2), 10*(2+5), 11*(11+12), 2*(2+3), ..).

0, 4, 21, 14, 40, 42, 40, 45, 70, 253, 10, 351, 44, 63, 42, 340, 63, 418, 52, 87, 68, 598, 84, 140, 80, 93, 18, 1711, 16, 1953, 76, 135, 104, 215, 10, 148, 798, 624, 200, 410, 210, 602, 176, 528, 102, 140, 2350, 208, 364, 14, 1020, 208, 1378, 270, 180, 638, 192, 231

Offset

1,2

Links

Table of n, a(n) for n=1..58.

Example

13*(13+14)=351=a(12).
2*(7+15)=44=a(13).
3*(5+16)=63=a(14).
2*(4+17)=42=a(15).
17*(18+2)=340=a(16).
3*(2+19)=63=a(17).
19*(20+2)=418=a(18).
2*(5+21)=210=a(19),
etc.

Crossrefs

Cf. A002808.

Sequence in context: A128452 A333433 A202450 * A338421 A365101 A329404

Adjacent sequences: A144289 A144290 A144291 * A144293 A144294 A144295

Keyword

nonn

Author

Juri-Stepan Gerasimov, Dec 01 2008

Extensions

Corrected (210 replaced by 52, 506 by 68, 72 by 76 etc.) by R. J. Mathar, May 01 2010

Status

approved