A147849 a(n) is the smallest triangular number > n-th prime.

3, 6, 6, 10, 15, 15, 21, 21, 28, 36, 36, 45, 45, 45, 55, 55, 66, 66, 78, 78, 78, 91, 91, 91, 105, 105, 105, 120, 120, 120, 136, 136, 153, 153, 153, 153, 171, 171, 171, 190, 190, 190, 210, 210, 210, 210, 231, 231, 231, 231, 253, 253, 253, 253, 276, 276, 276, 276

Offset

1,1

Links

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

Mathematica

a1 = Reap[Do[p = Prime[m]; Do[t = n (n + 1)/2; If[t > p, Sow[t]; Break[]], {n, 200}], {m, 100}]][[2, 1]]

Crossrefs

Cf. A097050 (smallest prime > n-th triangular number).

Cf. A000040, A000217.

Sequence in context: A316563 A349212 A316140 * A332546 A002853 A278807

Adjacent sequences: A147846 A147847 A147848 * A147850 A147851 A147852

Keyword

nonn

Author

Zak Seidov, Nov 15 2008

Status

approved