43509
domain: N
Appears in sequences
- cosh(tanh(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+19/4!*x^4-140/5!*x^5...at n=8A013126
- Convolution of the lower and upper Wythoff sequences (A000201 and A001950).at n=38A023664
- Difference between length (A005341) and sum of digits (A004977) of n-th term in Look and Say Sequence (A005150).at n=39A056635
- Column 6 of triangle A091602.at n=49A091609