37830

Appears in sequences

• Squarefree oblong (pronic) numbers having an odd number of prime factors.at n=29A098827
• a(n+1) = a(n) + (if a(n) is odd then (next odd square) else (next even square)), a(0) = 1.at n=31A116955
• a(n) = 3abc, where (a,b,c) is a Markoff triple. The first Markoff triple considered is (1,2,5) and the ordering is increasing.at n=6A120339
• Half the number of length n integer sequences with sum zero and sum of squares 7442.at n=3A157593
• Rectangular array T(n,k) = binomial(n+1,2)*(n^k - (n-1)^k) read by antidiagonals.at n=47A178831
• Integers that do not have a partition into a sum of an odd square and two (not necessarily distinct) triangular numbers.at n=50A191764
• Number of 4-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero with no three beads in a row equal.at n=29A208946
• Number of ways of arranging n lines in the (affine) plane.at n=7A241600
• a(n) = 2*3^n - 3*2^n.at n=9A245804
• Coordination sequence for (3,3,4) tiling of hyperbolic plane.at n=27A265071
• Oblong numbers m such that beta(m) = tau(m)/2 where beta(m) is the number of Brazilian representations of m and tau(m) is the number of divisors of m.at n=1A326385
• Number of strict multiset partitions of multiset partitions of integer partitions of n.at n=12A330453
• Sum of the prime numbers in, but not on the border of, an n X n square array whose elements are the numbers from 1..n^2, listed in increasing order by rows.at n=26A344847
• Oblong numbers which are products of five distinct primes.at n=12A359304
• Semiperimeter of the unique primitive Pythagorean triple whose inradius is the n-th odd prime and whose short leg is an even number.at n=42A380301