19505

Appears in sequences

• Sums of 5 distinct powers of 5.at n=19A038477
• Icosagonal numbers for which the sum of the digits is also an icosagonal number.at n=4A117799
• Numerator of Sum[ (-1)^(k+1) * 1/2^Prime[k], {k,1,n} ].at n=6A122150
• Triangle read by rows: T(n,k) is the number of partitions of the set {1,2,...,n}, having exactly k blocks consisting only odd entries (0<=k<=ceiling(n/2)).at n=45A124420
• Integer part of cube root of product of first n primes.at n=11A127600
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 0), (0, 0, -1), (1, 0, 1)}.at n=10A148668
• Power ceiling-floor sequence of sqrt(5).at n=11A218982
• Record values in A216476.at n=24A306564
• Number of recursively anti-transitive rooted trees with n nodes.at n=14A324765
• Number of integer partitions of n whose first differences (assuming the last part is zero) are not unimodal.at n=37A332284
• Expansion of 1/Product_{k>=1} (1 - x^k)^(valuation(k,4) + 1).at n=32A373295