21435

Appears in sequences

• a(n+1) = a(n) converted to base 9 from base 7 (written in base 10).at n=19A023389
• Number of factorizations into distinct factors with 3 levels of parentheses indexed by prime signatures. A050349(A025487).at n=41A050350
• Array read by rows in which the n-th row contains the multiples of n in increasing order using all the digits of first n numbers.at n=21A078189
• Numbers with 5 distinct digits {1,2,3,4,5} such that all adjacent digits (as well as first and last digits) are coprime.at n=13A104972
• 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, -1), (-1, 0, 0), (0, -1, 1), (0, 0, 1), (1, 1, 0)}.at n=8A150230
• Permutations of 12345: Numbers having each of the decimal digits 1,...,5 exactly once, and no other digit.at n=26A178475
• Expansion of Sum_{k>=0} x^((k+1)^2)/(1-x)^k.at n=57A236310
• Number of aperiodic necklaces (Lyndon words) with k<=6 black beads and n-k white beads.at n=29A277631
• List of André permutations of the first kind.at n=15A278982
• Nearest integer to the product of all integer roots of n from the second to the n-th.at n=28A330153
• Sum_{n>=0} a(n) * x^n / (n!)^2 = exp(-x) / BesselJ(0,2*sqrt(x)).at n=6A336608
• Number of recursively bi-anti-transitive ordered rooted trees with n nodes.at n=12A358456
• Number of 4 element sets of distinct integer sided rectangles that fill an n X n square.at n=34A387171