1,1

Subsequence of A112355: it doesn't require the three positive triangular numbers to be distinct.

45 is a term because 45 = 3 + 6 + 36 and these four numbers are distinct triangular numbers (A000217(9) = A000217(2) + A000217(3) + A000217(8)).

Cf. A000217 (triangular numbers), A112352 (triangular numbers that are the sum of two distinct positive triangular numbers), A112355.

Sequence in context: A113962 A031105 A054501 this_sequence A031077 A082286 A088407

Adjacent sequences: A112350 A112351 A112352 this_sequence A112354 A112355 A112356

nonn

Rick L. Shepherd (rshepherd2(AT)hotmail.com), Sep 05 2005