22135

Appears in sequences

• Numbers whose base-5 representation contains exactly three 0's and three 2's.at n=24A045187
• Iccanobirt numbers (5 of 15): a(n) = R(a(n-1)) + a(n-2) + R(a(n-3)), where R is the digit reversal function A004086.at n=15A102115
• Self-convolution cube of A108447.at n=6A118342
• Triangle, read by rows, where diagonals are successive self-convolutions of A108447.at n=51A118343
• Matrix square of triangle V = A136230, read by rows.at n=16A136234
• Number of ways to place 4 nonattacking bishops on a 4 X n board.at n=8A172208
• Sequence whose Hankel transform is a (1,1) Somos-4 sequence.at n=19A174013
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+497)^2 = y^2.at n=22A207077
• Number of inequivalent n X 3 binary matrices, where equivalence means permutations of rows or columns or the symbol set.at n=16A246148
• Riordan array (f(x)^3, f(x)), where 1 + x*f^3(x)/(1 - x*f(x)) = f(x).at n=21A263917
• The total number of different isosceles trapezoids, excluding squares, that can be drawn on an n X n square grid where the corners of each individual trapezoid lie on a lattice point.at n=37A272459
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + b(n-2) + 2, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=16A294554
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) - b(n-2), where a(0) = 3, a(1) = 5, b(0) = 1, b(1) = 2, b(2) = 4, and (a(n)) and (b(n)) are increasing complementary sequences.at n=22A296846
• Number of integer compositions of n with no ones or runs of length 1.at n=42A353508