20406

Appears in sequences

• Convolution of A000203 with itself.at n=35A000385
• Generalized Stirling numbers, [n+2,n]_2.at n=18A001701
• Consider all integer triples (i,j,k), j,k>0, with i^3=j^3+binomial(k+2,3), ordered by increasing i; sequence gives k values.at n=21A054236
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,5.at n=33A064239
• Numbers k such that the coefficient of x^k in the expansion of Product_{j>=1} (1 - x^j)^5 is zero.at n=27A302057
• Triangle read by rows: T(n,k) is the number of non-backtracking walks on Z^2 of length n that are active for k steps, where the walk is initially active and turns in the walk toggle the activity.at n=60A307584
• Triangle read by rows: T(n,k) is the number of non-backtracking walks on Z^2 of length n that are active for k steps, where the walk is initially active and turns in the walk toggle the activity.at n=62A307584
• Expansion of Product_{k>=1} B(x^k), where B(x) is the g.f. of A003106.at n=44A327691
• Sum of largest emergent parts of the partitions of n.at n=32A330242
• Positions of records in A366091.at n=50A366065
• Indices n where a run of primes begins in A375564.at n=12A376192