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A069792 Triangular numbers in A062918. 1
1, 3, 6, 10, 15, 21, 28, 36, 45, 78, 3741, 4005, 4278, 14028, 224115, 238395, 258121, 994755, 1104841, 2440945, 4601061, 19185915, 26451901, 27073761, 38250631, 611712753, 1787631321, 3620877351, 4427640253, 16786524835, 60302220121, 65003739895, 226236074130, 367188935361, 6710200324191 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
PROG
(PARI) rev(n) = eval(concat(Vecrev(Str(n))));
lista(nn) = {s = 0; for (n=1, nn, s += rev(n); if (ispolygonal(s, 3), print1(s, ", ")); ); } \\ Michel Marcus, Sep 15 2015
CROSSREFS
Cf. A062918.
Sequence in context: A089717 A050760 A075057 * A194153 A025737 A120721
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Apr 09 2002
EXTENSIONS
More terms from Jason Earls, May 16 2002
More terms from Michel Marcus, Sep 15 2015
STATUS
approved

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Last modified March 1 12:27 EST 2024. Contains 370433 sequences. (Running on oeis4.)