153510

Appears in sequences

• Number of positive integers <= 2^n of form 3 x^2 + 3 y^2.at n=21A054161
• Bessel polynomial {y_n}''(-1).at n=6A065944
• T(n,k) is the number of permutations of the multiset {1, 1, 2, 2, ..., n, n} with k occurrences of fixed pairs (j,j), where T(n,k), n >= 2, 0 <= k <= n-2 is a triangle read by rows.at n=25A375220
• Products of 6 distinct primes that are sandwiched between twin prime numbers.at n=6A378097
• Area of the unique primitive Pythagorean triple whose inradius is A000108(n) and such that its long leg and its hypotenuse are consecutive natural numbers.at n=5A381483
• Area of the unique primitive Pythagorean triple whose inradius is A002378(n) and such that its long leg and its hypotenuse are consecutive natural numbers.at n=6A384566