40416

Appears in sequences

• Coefficient triangle of polynomials (falling powers) related to convolutions of A002605(n), n>=0, (generalized (2,2)-Fibonacci). Companion triangle is A073403.at n=8A073404
• Coefficient triangle of polynomials (rising powers) related to convolutions of A002605(n), n>=0, (generalized (2,2)-Fibonacci). Companion triangle is A073405.at n=7A073406
• Number of meaningful differential operations of the n-th order on the space R^9.at n=13A090994
• Number of 9 X 9 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.at n=5A156399
• Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 5.at n=7A156438
• Number of binary strings of length n with equal numbers of 00001 and 11000 substrings.at n=16A164208
• Smallest sequence which lists the position of digits "3" in the sequence.at n=41A167453
• Number of 5 X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..1 5 X n array.at n=30A220035
• T(n,k) is the number of (n+2) X k 0..2 arrays with all rows having a nonnegative second derivative, and all columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative.at n=10A223391
• Number of 3Xn 0..2 arrays with all rows having a nonnegative second derivative, and all columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative.at n=4A223392
• a(n) = Sum_{i=0..n} Sum_{j=0..n} (i XOR j), where XOR is the binary logical exclusive-or operator.at n=39A224923
• Expansion of e.g.f. 6 / (7 - 6*x - exp(6*x)).at n=5A355114
• Expansion of Sum_{k>0} k! * ( x * (1+x^k) )^k.at n=7A370668