22631

Appears in sequences

• Differences of reciprocals of unity.at n=1A001238
• Expansion of 1/((1-2x)(1-3x)(1-6x)).at n=5A001240
• Triangle read by rows of differences of reciprocals of unity.at n=26A008969
• Expansion of x/(1 - 7*x - 4*x^2).at n=6A015561
• Graham-Sloane-type lower bound on the size of a ternary (n,3,6) constant-weight code.at n=11A030506
• Triangle from inverse scaled Pochhammer symbols.at n=30A112492
• Expansion of 1/(1-x-x^5-x^6).at n=31A121832
• Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 6.at n=45A136974
• Partial sums of A027642.at n=30A173242
• Number of imperfect staircase polygons by area.at n=9A173414
• Number of (5+2)X(n+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=10A252966
• Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.at n=2A253369
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.at n=8A253375
• Number of (3+1)X(n+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.at n=1A253377
• Numbers k such that the decimal expansions of both k and k^2 have 1 as smallest digit and 6 as largest digit.at n=23A257197
• Square array read by ascending antidiagonals where T(n,k) is the mean number of maxima in a set of n random k-dimensional real vectors (numerators).at n=33A257894
• a(n) = A341529(n) - A341528(n) = (sigma(n)*A003961(n)) - (n*sigma(A003961(n))).at n=63A341512