A035253 Second differences are 2,2,1,2,1,1,2,1,1,1,2,1,1,1,1,2,1,1,1,1,1,2,.. (A035214).

4, 1, 0, 1, 3, 7, 12, 18, 26, 35, 45, 56, 69, 83, 98, 114, 131, 150, 170, 191, 213, 236, 260, 286, 313, 341, 370, 400, 431, 463, 497, 532, 568, 605, 643, 682, 722, 763, 806, 850, 895, 941, 988, 1036, 1085, 1135

Offset

0,1

Links

Table of n, a(n) for n=0..45.

Crossrefs

Different from A005228. Cf. A035254.

Sequence in context: A347618 A290459 A290458 * A070432 A170989 A290457

Adjacent sequences: A035250 A035251 A035252 * A035254 A035255 A035256

Keyword

nonn,easy

Author

Robet Bronson (bob(AT)bronsons.com)

Status

approved