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A079257 a(n) is taken to be the smallest positive integer greater than a(n-1) which is consistent with the condition "n is a member of the sequence if and only if a(n) is a triangular number". 3
0, 1, 4, 5, 6, 10, 15, 16, 17, 18, 21, 22, 23, 24, 25, 28, 36, 45, 55, 56, 57, 66, 78, 91, 105, 120, 121, 122, 136, 137, 138, 139, 140, 141, 142, 143, 153, 154, 155, 156, 157, 158, 159, 160, 161, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 190, 210, 231 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..57.

B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence, J. Integer Seqs., Vol. 6 (2003), #03.2.2.

B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence (math.NT/0305308)

CROSSREFS

See A079000, A079253, A079254, A079256, A079258 for similar sequences.

Sequence in context: A114439 A310570 A271146 * A001609 A101590 A057916

Adjacent sequences:  A079254 A079255 A079256 * A079258 A079259 A079260

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane and Matthew Vandermast, Feb 04 2003

STATUS

approved

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Last modified February 16 21:59 EST 2019. Contains 320200 sequences. (Running on oeis4.)