48790

Appears in sequences

• Numbers of Twopins positions.at n=20A005683
• Number of incongruent ways to tile a 5 X 2n room with 1x2 Tatami mats. At most 3 Tatami mats may meet at a point.at n=43A068930
• Numbers which when multiplied by any repunit prime Rp give a Smith number.at n=30A104167
• Number of (w,x,y,z) with all terms in {1,...,n} and w <= harmonic mean of {x,y,z}.at n=19A212104
• a(n) = n*(7*n^2 + 15*n + 8)/6.at n=34A245301
• Numbers n such that for every k = 1, 2, ..., A305706(n)-1, it is possible to insert plus signs into the decimal representation of n^k to make sum equal n.at n=47A305707
• Heptagonal numbers which are products of five distinct primes.at n=1A353019
• Expansion of e.g.f. 1/(1 - Sum_{k>=1} x^(k^2) / (k^2)!).at n=8A353180
• a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(k+3,3) * a(k) * a(n-1-k).at n=5A385952